Improvement in tuyeres



wUNITED STATES LEVI A. DOLE, OF SALEM, OIIIO.

IMPROVEMENT IN TUYERES.

Spccitication forming part of Letters Patent No. 58,0177, dated September 18, 1866.

To all whom it may concern Be it known that I, LEVI A. DOLE, of Salex11,Golu1nbiana county, and State of' Ohio, have invented a new and Improved Tuyere; and I do hereby decla-re that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is an external view ot' the improved tuyere. Figui). is a diametrical section lthrough it. Fig. 3 is au end view of the discharging end of the tuyere. Fig. 4 is a section through the hollow globe. Y

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to an improvement in the construction of tuyeres which have watercbambers surrounding those parts which are most exposed to the intense heat ot' the furnace, for the purpose oi' keeping the tuyere cool and preventing it from rapidly burning out.

The nature ot' my invention consists in constructing tuyeres of this description ot' one piece of metal, so that there `shall not be any joints to become leaky in case of neglect to keep the tuyere cool by the stopping of the circulation of water through the chambers, as will be hereinafter described.

To enable others skilled in the art to understand my invention, I will describe its construction and operation.

In the accompanying drawings. A represents a tapering pipe, which may be made of any suitable capacity for the passage of air through it. The largest end of this pipe A is suitably affixed to the nozzle of a bellows or air-engine, and the air is discharged through the smallest end directly into the bed of the forge or furnace. Surrounding the small end ot' the pipe A is a hollow globe, B, which forms a chamber that has but two openings, a a. These openings c a are tapped to receive screw-threads, that are formed on pipes D E, which communicate with a keg or suitable reservoir of water, so that thc chambered globe B shall be kept lled with water for cooling and keeping cool the discharging end of the globe.

The tapering pipe A and its globe B are cast in one solid piece, so that there are no joints, in the following manner: A sand core is made-corresponding in shapeand size to the ychamber within the globe B, with two necks on it for producing the inlet and outlet passages a cf, and this core is suitably anchored and centered within` a sand mold corresl'londing in shape and size to the eXterior ot' the tuyere.

.l'n this manner the thickness of the metal of the tuyere-pipe and its hollow globe may be made equal throughout, and thus no dan` ger from unequal expansion or contraction need be apprehended.

This tuyere is placed in thc forge or furnace with one pipe, D, above the other, E, the lowest pipe being connected near the bottom of a water-reservoir, while the other pipe passes over the top of such reservoir, and is bent downward, so as to conduct the water' and steam from the hollow globe B back into said reservoir, thus allowing of acirculation of water through this globe whereitis heated.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A tuyere which is composed of blast-pipe A and a chambered portion, B, cast in one piece, substantially as described.

L. A. DOLE.

Witnesses:

WM. H. GARRIGUES, N. B. WATsoN. 

